{"id":25703,"date":"2024-03-16T05:26:31","date_gmt":"2024-03-16T05:26:31","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-does-scanner-mean-in-java\/"},"modified":"2024-03-22T06:48:49","modified_gmt":"2024-03-22T06:48:49","slug":"what-does-scanner-mean-in-java","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-does-scanner-mean-in-java\/","title":{"rendered":"What does “scanner” mean in Java?"},"content":{"rendered":"

In Java, `Scanner` is a class used to read data from standard input, files, or other input streams. It provides convenient methods for parsing and retrieving values from user input or other data sources.<\/p>\n

Using the `Scanner` class allows for the splitting of data in input streams into different tokens, such as integers, floating-point numbers, strings, etc., and extracting specific values from these tokens. The `Scanner` class offers various methods for reading different types of data, like `nextInt()`, `nextDouble()`, `nextLine()`, etc.<\/p>\n

Here are some common usages of the `Scanner` class:<\/p>\n

import java.util.Scanner;
<\/p>
public class Main {<\/p>
    public static void main(String[] args) {<\/p>
        Scanner scanner = new Scanner(System.in); \/\/ \u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u6570\u636e<\/p>
        System.out.print(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff1a\");<\/p>
        int num = scanner.nextInt(); \/\/ \u8bfb\u53d6\u6574\u6570<\/p>
        System.out.println(\"\u60a8\u8f93\u5165\u7684\u6574\u6570\u662f\uff1a\" + num);<\/p>
        System.out.print(\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6d6e\u70b9\u6570\uff1a\");<\/p>
        double decimal = scanner.nextDouble(); \/\/ \u8bfb\u53d6\u6d6e\u70b9\u6570<\/p>
        System.out.println(\"\u60a8\u8f93\u5165\u7684\u6d6e\u70b9\u6570\u662f\uff1a\" + decimal);<\/p>
        System.out.print(\"\u8bf7\u8f93\u5165\u4e00\u884c\u6587\u672c\uff1a\");<\/p>
        String text = scanner.nextLine(); \/\/ \u8bfb\u53d6\u4e00\u884c\u6587\u672c<\/p>
        System.out.println(\"\u60a8\u8f93\u5165\u7684\u6587\u672c\u662f\uff1a\" + text);<\/p>
        scanner.close(); \/\/ \u5173\u95edScanner\u5bf9\u8c61<\/p>
    }<\/p>
}<\/p><\/pre>\n
By creating a `Scanner` object and specifying the input stream, you can read different types of data from the console or any other input source. This class is a commonly used utility class in the Java standard library, and can be used for interactive input, file parsing, and other scenarios.<\/p>\n","protected":false},"excerpt":{"rendered":"
In Java, `Scanner` is a class used to read data from standard input, files, or other input streams. It provides convenient methods for parsing and retrieving values from user input or other data sources. Using the `Scanner` class allows for the splitting of data in input streams into different tokens, such as integers, floating-point numbers, […]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-25703","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nWhat does "scanner" mean in Java? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/what-does-scanner-mean-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What does "scanner" mean in Java?\" \/>\n<meta property=\"og:description\" content=\"In Java, `Scanner` is a class used to read data from standard input, files, or other input streams. 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